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Photograph of a
commercial air conditioning compressor charging gauge set (C) InspectAPedia.com Air Conditioner / Heat Pump Refrigerant Pressure Too Low - Undercharged
Effects of a low charge, under-charged refrigerant pressures and leaks: not enough refrigerant

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Low refrigerant or refrigerant undercharge effects on air conditioners & heat pumps or other HVACR equipment:

This article explains the symptoms of and problems caused by not enough refrigerant in cooling equpment.

Refrigerant charge quantity for air conditioners & heat pumps: This air conditioning repair article series discusses the the diagnosis and correction of abnormal air conditioner refrigerant line pressures as a means for evaluating the condition of the air conditioner compressor motor, which in turn, is a step in how we evaluate and correct lost or reduced air conditioner cooling capacity.

We explain how overcharging or undercharging of refrigerant in an air conditioner or heat pump is detected and we list the effects of overcharged or undercharged refrigerant. We also explain the various causes of liquid slugging a compressor motor.



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Effects of Undercharging the Refrigerant Level in an Air Conditioner, Heat Pump, or other refrigeration equipment

Photograph of a
commercial air conditioning compressor charging chartEffect of too little refrigerant in the system

When we undercharge an air conditioner, heat pump, or other refrigeration equipment

Bottom line about undercharging refrigerants: For residential equipment such as air conditioners, heat pumps, refrigerators, freezers, to work properly you must have exactly the correct charge in the system.

at FROST BUILD-UP on AIR CONDITIONER COILS we also explain that in a properly tuned and adjusted refrigeration system there will be liquid refrigerant found all the way to just at the end of the evaporator coil - this gives us maximum cooling efficiency of the equipment.

Effects of Overcharging the Refrigerant Level in an Air Conditioner, Heat Pump, or other refrigeration equipment

The effect of too much refrigerant in the system - overcharging, over-metering, or other high refrigerant pressure situations are detailed at EFFECTS of OVER CHARGING of REFRIGERANT

If your air conditioning or heat pump system has lost its cooling capacity or won't start see REPAIR GUIDE for AIR CONDITIONERS.

See COOLING CAPACITY, RATED of air conditioning equipment if the system seems to be working but is inadequate to cool your building. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.

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Continue reading at TEV INSTALL & REPAIR or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see FROST BUILD-UP on AIR CONDITIONER COILS

Or see GAUGE, REFRIGERATION PRESSURE TEST

Or see REFRIGERANT CHARGING PROCEDURE

Or see REFRIGERANT PRESSURE READINGS & CHARTS

Or see these

Air Conditioning & Heat Pump Refrigerant Articles

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UNDER CHARGED REFRIGERANT, EFFECTS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

INDEX to RELATED ARTICLES: ARTICLE INDEX to AIR CONDITIONING & HEAT PUMPS

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